Cognitive radio (CR) is a facilitating technology to efficiently deal with the spectrum scarceness, and it will significantly enhance deployment of upcoming wireless transmission method. Security significant concern, although not well tackle in cognitive networks (CRN). In CR networks, this approach regard as security issue happen from primary user emulation attack (PUEA). A PUEA attacker forwa...

The primary intention of this paper is to combat the effect of Primary User Emulation Attack which is the main security issue in physical layer of cognitive network. The authentication information is solely known and shared between only the intended secondary users and the helper node. Here this helper node is the overall coordinator for this authentication information exchange. This task is do...

Cryptography is the process of transforming an intelligible message into one that's unintelligible and then re transforming that message back to its original form. This transformation along cryptography is done by using an algorithm. In this we propose a reliable Advanced Encryption Standard algorithm for the process of encryption and decryption. The AES (Advanced Encryption Standard) algorithm...

Primary User Emulation Attack (PUEA), in which attackers emulate primary user signals causing restriction of secondary access on the attacked channels, is a serious security problem in Cognitive Radio Networks (CRNs). An user performing a PUEA for selfishly occupying more channels is called a selfish PUEA attacker. Network managers could adopt a surveillance process on disallowed channels for i...

Cognitive wireless sensor network (CWSN) is a new paradigm, integrating cognitive features in traditional wireless sensor networks (WSNs) to mitigate important problems such as spectrum occupancy. Security in cognitive wireless sensor networks is an important problem since these kinds of networks manage critical applications and data. The specific constraints of WSN make the problem even more c...

Cognitive wireless sensor network (CWSN) is a new paradigm, integrating cognitive features in traditional wireless sensor networks (WSNs) to mitigate important problems such as spectrum occupancy. Security in cognitive wireless sensor networks is an important problem since these kinds of networks manage critical applications and data. The specific constraints of WSN make the problem even more c...

A latest communication technology named “Cognitive Radio Network” is a network in which an un-licensed user can use a freed channel in a spectrum band of licensed user. One of the spectrum management functions is spectrum sensing which the most critical function in the entire communication. If there will be any discrepancy in its functioning then the entire network will be disturbed which would...